Sweet; glue (3)
I believe the answer is:
gum
This clue is a double definition.
'sweet' is the first definition.
(gum is a kind of sweet)
'glue' is the second definition.
(I know that glue can be written as gum)
(Other definitions for gum that I've seen before include "surrounding roots of teeth?" , "Sticky stuff - tree" , "seal" , "Adhesive - eucalyptus" , "Chewy stuff, hard to clean away" .)